Can anyone kindly point me in the right direction here please?
I have a set of devices (A, B, C ... Z) which are all simple switches and might independently be in an "on" or "off" state. What I'd like is a dashboard button which will switch them all to "off".
It seems I can't use a "scene", because I don't want to have to cancel the scene and I don't want to stop devices being turned back on.
It seems I can't use a group, because I'd have to switch the group "on" before I can switch it "off" again.
I just want a simple trigger switch which will turn everything that's "on" to "off", and then let everything go about its normal buiness. Can I make some sort of "virtual push button" and use it as a Rule machine trigger?
Any pointers, links etc greatly appreciated.